195 



LYTHRACEAE: ROTALA. 



196 



plus minus obtusa, membranacea, uninervia vel vix penninervia. Flores 

 solitarii, sessiles, omnes fere foliorum axillas quae ramis carent occup- 

 pantes; peophylla calycem aequantia vel dimidio breviora, anguste 

 lateve lanceolata, acutiuscula, subherbacea. Calyx 27a — 4, dein 5 mm. 

 longus, urceolato-campanulatus , post anthesin auctus, subglobosus, 8- 

 nervius, herbaceus, interdum coloratus, 4-merus , raro 5-merus; lobi 

 late triangulares, breves, subacuminati, subconniventes ; appendices latae, 

 subapiculatae vel subcorniformes , subrecurvae, lobis dimidio breviores 

 sublongioresve. Petala 4 (vel 5) lobos aequantia paullove longiora, 

 albida vel pallide purpurea, fugacia. STAMINA 4 (5), medio tubo inserta; 

 filamenta tubum calycinum haud aequantia. Ovarium subovoideo-globo- 

 sum, 3— 4-loculare; stylus ovario multoties brevior. Capsula calyce 

 abscondita, cartilaginea , 3 — 4-locularis , apice 3 — 4-valvis; placentae in 

 sectione transversali malleiformes ; semina creberrima, minima, sub- 

 globosa. 



Habitat in provinciis Bio de Janeiro, Minas Geraes et Bahia, ubi 

 lecta est a viris cl. Vauthier, Sello, Gardner n. 999, Salzmann et St-Hilaire ; 

 praeterea in Antillis, republica Mexicana, America boreali et insults Philippinis. 



Obs. I. Capsulam irregulariter dehiscere errore deceptus com- 

 memorat cl. Geisebach. 



Obs. II. Species adhuc Ammanniis adjuncta ob capsulam valvis 

 dehiscentem floresque solitarios (qui in Ammannia nunquam occurrunt), 

 inter Botalas haud dubie enumeranda est. 



2. ROTALA MEXICANA CHAM, et SCHL. repens, sub- 

 mersa vel apice emersa, e nodis radicans, caulibus filiformibus, 

 ramis dum adsunt subcapillaceis , foliis oppositis ternis quater- 

 ni8ve, submersis angustissime linearibus, emersis lanceolatis ob- 

 longisve, omnibus basi brevissime aeuminatis , apice obtusis vel 

 plerumque retusis, floribus sessilibus, 4 — 5-, raro 3-meris, 

 minimis, prophyllis albido-pellucidis, calycibus late campanulatis 

 semiglobosisve , scariosis, (3 — )4 — 5-nerviis, nervis commissura- 

 libus, lobis tubo aequalibus enerviis, appendicibus nullis, petalis 

 nullis, staminibus 2, raro 3, ipsi calycis basi insertis, inclusis, 

 ovulis sub-13, stigmate sessili, capsula inferne 2 — 3-loculari, 

 globosa, lobos calycinos aequante, placentis haud mallei- 

 formibus. 



Var. a. calycibus minimis, circ. 2 /a mm « longis, late cam- 

 panulatis, saepe tetrameris, caulibus simplicibus, rarius basi 

 ramosis. 



Forma 1. minima, caule 2—3 cm. longo, foliis 3—4 mm. longis, 

 angustissime linearibus , calycis lobis tubum longitudine aequantibus, 

 aeuminatis, staminibus 2, capsula 2-valvi (an semper?). 



Botala verticillaris Hook. fil. et Thorns. Hb. Ind. or., nee Linn. 

 ? Rotala pusilla Tul. Ann. Sc. not. sir. 4. VI. 128. 



Forma 2. media, caule 3—8 cm. longo, foliis 4—7 mm. longis, 

 angustissime linearibus, calycis lobis tubo paullo brevioribus, minus 

 aeuminatis, staminibus 2 — 3, capsula 3-valvi. 



Botala Mexicana Cham. Schl. Linnaea V. 567 ; Walp. Bep. II. 101. 



Forma 3. MAJOR, caule 6 — 13 cm. longo, robustiori, magis ramoso, 

 foliis ad 13 mm. longis linearibus, superioribus lanceolatis, calycis lobis 

 ut in forma 1., capsula 3-valvi. 



Tabula nostra XXXIX. Fig. II. a. 



IHypobrichia Spruceana var. tenuifolia Griseb. PL Cub. p. 106. 



Var. /3. SPRUCEANA Benth. in hb. Spruce (sp. pr.), caly- 

 cibus paullo majoribus, sed 1 mm. parum superantibus , semi- 

 globosis , 5-meris , staminibus 2 , capsula trivalvi , caulibus plus 



minus ramosis, 4—10 cm. longis, foliis superioribus oblongis 

 lanceolatisve. 



Tabula nostra XXXIX. Fig. II. b. 



Rotala verticillaris var. ft. Spruceana Hiern in Oliv. FZ, 

 Trop. Afr. II. 465, nee Linn. 



Caulis tenuiter filiformis, 2 — 10, rarius 17 cm. longus, repens et 

 e nodis radicans, submersus vel apice emersus, simplex vel ramosus 

 ramis saepe subcapillaceis. Folia internodiis plerumque longiora, rarius 

 subbreviora, opposita, terna, quaterna, inferiora (submersa) angustissime 

 linearia, 3 — 13 mm. longa, vix */»— lmm. lata, sursum interdum sensim 

 breviora latioraque, superiora (emersa, dum adsunt) lanceolata vel ob- 

 longa, 3 — 4 mm. longa, 1 mm. lata, omnia basi brevissime acuminato- 

 contracta, versus apicem sensim angustata, obtusa vel retusa, sed vix 

 bimucronata, tenuissime membranacea, penninervia, nervis tenuissimis, 

 lateralibus in nervum marginalem confluentibus , submersa saepe sub- 

 pellucida. Flores in axillis foliorum sessiles; prophylla 2 lineari- 

 subulata, albido-pellucida , calyci subaequalia vel breviora. Calyx 

 2 /s — 1 mm. longus, late campanulatus vel semiglobosus, 5 — 4-, raro 

 3-lobu8, tenuiter scariosus, 5 — 4- (—3-) nervius, nervis commissuralibus ; 

 lobi enervii, tubum longitudine aequantes paullove breviores, acuti vel 

 acuminati; appendices nullae. Petala nulla. Stamina 2, rarius 3, 

 calycis imae basi inserta, dimidios circiter lobos aequantia. Ovarium 

 globosum, inferne 2 — 3-loculare, supra placentam 1-loculare; stigma 

 sessile. Capsula globosa, usque ad basin 2 — 3-valvis, calycis late 

 aperti, semiglobosi lobos baud superans ; placenta breviter clavata, medio 

 persistens, dimidiam capsulam aequans Semina minima, haud numerosa 

 (sub-13). 



Habitat var. or. forma 1. in India orientals; forma 2. in Africa 

 ( Schweinfurth n. 2434) et in republica Mexicana (Schiede n. 566) ; forma 3. 

 in Brasilia, ubi coliecta est a cl. Vauthier, et ad Bio Beason a cl. Pohl 

 (n. 2299). — Var. @. in vicinia Santarem provinciae Brasiliensis Para: 

 Spruce n. 805, et in udis prov. Minas Geraes: Martius. 



Obs. Botala verticillaris Linn, facile distinguitur staminibus multo 

 altius insertis. Botalam Mexicanam Cham, et Schl. a Lythraceis removen- 

 dam et forsan Caryophyllaceis adnumerandam esse nullo jure suspicatur 

 Hooker fil. in Benth. et Hook. Gen. pi. I. 776. 



II. LYTHRUM LINN. (ang. circ). 



LYTHRUM Linn. Gen. 138; Juss. Gen. 332; Gaertn. Fruct. I. 

 269. t. 62; Benth. et Book. Gen. pi. I. 779 (excl. syn. Anisote 

 Lindl.); DC. Mem. Gen. III. 2. p. 77, et Prodr. HI. 80; 

 Walp. Rep. V. 674, et Ann. II. 539, III. 863, IV. 688; H.B.K. 

 Nov. Gen. VI. 192. — Lythri sectiones Endl. Gen. p. 1200 

 (excl. sect. AnisotesJ. — Lythri species Linn. Spec. 640; Linn, 

 fil. Suppl. 250; St-HU. Fl. Bras. mer. III. 129 (106), excl. 

 Lythro anomalo; Walp. Rep. II. 103. — MOZULA Rafin. 

 Journ. phys. Ang. 1819. p. 71. — PENTAGLOSSUM Forsk. Descr. 

 11. — PYTHAG0REA Rafin. I. c. 96, nee Lour. — SALICARIA 

 Tournef. Inst. 253. 



FLORES 4— 6( — 7)-meri, regulares (vel obscure 

 bilaterali-symmetrici), haud parvi, saepe dimorphi vel 

 trimorphi. CALYX 8 — 12( — 14)-nervius, herbaceus, 

 tubulosus vel subcampanulatus , persistens, lobis tri- 

 angularibus aeuminatis brevibus, appendicibus plerum- 

 que eosdem superantibus, rarius brevissimis vel sub- 

 nullis. PETALA magna, rarius parvula, caduca (an 

 interdum 0?J, in alabastris inflexa et corrugata. STA- 

 MINA petaloriini numero dupla, aequalia (episepala), 



